/* Public event signup page (signup.html). Standalone: it does not load styles.css. */

:root {
    --primary: #1976d2;
    --primary-dark: #1565c0;
    --primary-light: #e3f2fd;
    --brand-deep: #2b3f86;
    --brand: #387cba;
    --on-brand: #ffffff;
    --on-brand-soft: rgba(255, 255, 255, 0.92);
    --success: #2e7d32;
    --success-light: #e8f5e8;
    --error: #c62828;
    --error-light: #fdecea;
    --surface: #ffffff;
    --background: #f4f5f7;
    --sunken: #f7f8fa;
    --border: #dcdfe4;
    --border-strong: #b9bec7;
    --text-primary: #1a1d21;
    --text-secondary: #5b626c;
    --on-primary: #ffffff;
    --shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 8px 24px rgba(16, 24, 40, 0.08);
    --radius: 8px;
    --radius-sm: 6px;
    --control-height: 44px;
    --transition: 0.15s ease;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary: #64b5f6;
        --primary-dark: #90caf9;
        --primary-light: #172536;
        --brand-deep: #1c2a5c;
        --brand: #234f7a;
        --success: #81c784;
        --success-light: #1b2e1c;
        --error: #ef9a9a;
        --error-light: #3a1d1d;
        --surface: #1c1e22;
        --background: #111214;
        --sunken: #23262b;
        --border: #33373e;
        --border-strong: #4a5059;
        --text-primary: #eceef1;
        --text-secondary: #a3a9b2;
        --on-primary: #111214;
        --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
        color-scheme: dark;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font);
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); }

/* Behavior-only: hides an element. */
.hidden { display: none !important; }

/* ---- header ---- */

.signup-hero {
    background: linear-gradient(140deg, var(--brand-deep) 0%, var(--brand) 100%);
    color: var(--on-brand);
    padding: 2.25rem 1.5rem 5.5rem;
    text-align: center;
}

.signup-brand svg { height: 48px; width: auto; display: inline-block; }
.signup-brand svg * { fill: var(--on-brand) !important; }

.signup-hero h1 {
    font-size: 2rem;
    font-weight: 700;
    margin: 1.25rem 0 0.5rem;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.signup-details {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.25rem 1.25rem;
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 0.95rem;
    color: var(--on-brand-soft);
}

.signup-details li { display: inline-flex; align-items: center; gap: 0.4rem; }
.signup-details svg { width: 16px; height: 16px; fill: currentColor; }

/* ---- sheet ---- */

.signup-sheet {
    max-width: 640px;
    margin: -4rem auto 2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.signup-capacity {
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border);
    display: grid;
    gap: 0.5rem;
}

.signup-capacity-row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.signup-capacity-row b { color: var(--text-primary); font-weight: 600; }

.signup-meter {
    height: 4px;
    background: var(--sunken);
    border-radius: 999px;
    overflow: hidden;
}

.signup-meter i {
    display: block;
    height: 100%;
    width: 0;
    background: var(--primary);
    border-radius: 999px;
    transition: width 0.4s ease;
}

.signup-section {
    padding: 1.75rem 2rem;
    display: grid;
    gap: 1.25rem;
}

.signup-section + .signup-section { border-top: 1px solid var(--border); }

.signup-section h2 {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 0;
    letter-spacing: -0.01em;
}

.signup-intro {
    margin: -0.75rem 0 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    white-space: pre-line;
}

.signup-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* ---- fields ---- */

.signup-field { display: grid; gap: 0.375rem; align-content: start; }

.signup-field > label,
.signup-question { font-weight: 500; font-size: 0.9rem; }

.signup-req { color: var(--error); margin-left: 0.1rem; }

.signup-help { font-size: 0.825rem; color: var(--text-secondary); }

.signup-error {
    font-size: 0.825rem;
    color: var(--error);
    display: flex;
    gap: 0.35rem;
    align-items: center;
}

.signup-error:empty { display: none; }

.signup-error::before {
    content: '';
    width: 14px;
    height: 14px;
    flex: none;
    background: currentColor;
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2a10 10 0 100 20 10 10 0 000-20zm1 15h-2v-2h2v2zm0-4h-2V7h2v6z'/%3E%3C/svg%3E") center / contain no-repeat;
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2a10 10 0 100 20 10 10 0 000-20zm1 15h-2v-2h2v2zm0-4h-2V7h2v6z'/%3E%3C/svg%3E") center / contain no-repeat;
}

.signup-field input[type="text"],
.signup-field textarea {
    font: inherit;
    font-size: 0.95rem;
    width: 100%;
    height: var(--control-height);
    padding: 0 0.8rem;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text-primary);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.signup-field input[type="text"]:hover,
.signup-field textarea:hover { border-color: var(--text-secondary); }

.signup-field input[type="text"]:focus,
.signup-field textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.signup-field [aria-invalid="true"] { border-color: var(--error); }
.signup-field [aria-invalid="true"]:focus { box-shadow: 0 0 0 3px var(--error-light); }

.signup-field textarea {
    height: auto;
    min-height: 15rem;
    padding: 0.7rem 0.8rem;
    font-family: var(--mono);
    font-size: 0.825rem;
    line-height: 1.55;
    resize: vertical;
}

/* ---- options ---- */

.signup-options {
    display: grid;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.signup-options[aria-invalid="true"] { border-color: var(--error); }
.signup-options-single { border-color: var(--border); }

.signup-option {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    padding: 0.8rem 0.9rem;
    cursor: pointer;
    font-size: 0.9rem;
    background: var(--surface);
    transition: background var(--transition);
}

.signup-option + .signup-option { border-top: 1px solid var(--border); }
.signup-option:hover { background: var(--sunken); }
.signup-option:has(input:checked) { background: var(--primary-light); }

.signup-option input {
    appearance: none;
    flex: none;
    width: 18px;
    height: 18px;
    margin: 0.1rem 0 0;
    border: 1.5px solid var(--border-strong);
    border-radius: 50%;
    background: var(--surface);
    display: grid;
    place-content: center;
    transition: border-color var(--transition);
}

.signup-option input:checked { border-color: var(--primary); }

.signup-option input:checked::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
}

.signup-option input:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.signup-option input[type="checkbox"] { border-radius: 4px; }
.signup-option input[type="checkbox"]:checked { background: var(--primary); }

.signup-option input[type="checkbox"]:checked::before {
    width: 10px;
    height: 10px;
    border-radius: 0;
    background: var(--surface);
    clip-path: polygon(14% 44%, 0 59%, 40% 100%, 100% 22%, 86% 8%, 40% 70%);
}

.signup-option-text { display: grid; gap: 0.1rem; }
.signup-option-text small { color: var(--text-secondary); font-size: 0.825rem; }
.signup-option-text small:empty { display: none; }

.signup-option-credit { animation: signup-reveal 0.25s ease; }

@keyframes signup-reveal {
    from { opacity: 0; transform: translateY(-4px); }
}

.signup-status { font-size: 0.825rem; color: var(--text-secondary); }
.signup-status:empty { display: none; }

/* ---- decklist ---- */

.signup-deck { display: grid; gap: 1.25rem; }

.signup-note {
    background: var(--sunken);
    border-radius: var(--radius-sm);
    padding: 0.9rem 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.signup-note ul { margin: 0; padding-left: 1.1rem; display: grid; gap: 0.25rem; }

.signup-count {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    font-variant-numeric: tabular-nums;
}

.signup-count b { font-weight: 600; }
.signup-count .is-complete { color: var(--success); }
.signup-count .is-incomplete { color: var(--error); }

.signup-problems {
    margin: 0;
    padding: 0.75rem 1rem 0.75rem 2rem;
    font-size: 0.825rem;
    color: var(--error);
    background: var(--error-light);
    border-radius: var(--radius-sm);
    display: grid;
    gap: 0.2rem;
}

.signup-problems:empty { display: none; }

/* ---- footer and submit ---- */

.signup-foot {
    padding: 1.25rem 2rem;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    background: var(--sunken);
    border-radius: 0 0 var(--radius) var(--radius);
}

.signup-foot small { color: var(--text-secondary); font-size: 0.8rem; }

.signup-btn {
    font: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    min-height: var(--control-height);
    padding: 0 1.5rem;
    border: 0;
    border-radius: var(--radius-sm);
    background: var(--primary);
    color: var(--on-primary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background var(--transition);
}

.signup-btn:hover { background: var(--primary-dark); }
.signup-btn:active { transform: translateY(1px); }
.signup-btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.signup-btn:disabled { opacity: 0.7; cursor: progress; transform: none; }

.signup-spinner {
    width: 14px;
    height: 14px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: signup-spin 0.7s linear infinite;
}

@keyframes signup-spin { to { transform: rotate(360deg); } }

.signup-alert {
    padding: 0 2rem 1.25rem;
    font-size: 0.875rem;
    background: var(--sunken);
    color: var(--error);
    border-radius: 0 0 var(--radius) var(--radius);
}

.signup-alert:empty { display: none; }

/* ---- loading, closed, done ---- */

.signup-message {
    text-align: center;
    padding: 3rem 2rem;
    display: grid;
    gap: 0.75rem;
    justify-items: center;
}

.signup-message:focus { outline: none; }
.signup-message h2 { margin: 0; font-size: 1.35rem; letter-spacing: -0.01em; }
.signup-message p { margin: 0; color: var(--text-secondary); }
.signup-message .signup-spinner { color: var(--primary); width: 20px; height: 20px; }

.signup-check {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--success-light);
    color: var(--success);
    display: grid;
    place-content: center;
}

.signup-check svg { fill: currentColor; }

.signup-footer {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding-bottom: 3rem;
    margin: 0;
}

/* ---- small screens ---- */

@media (max-width: 600px) {
    .signup-hero { padding: 1.75rem 1rem 5rem; }
    .signup-hero h1 { font-size: 1.6rem; }
    .signup-sheet { margin-inline: 0.75rem; }
    .signup-section, .signup-capacity { padding-inline: 1.25rem; }
    .signup-row { grid-template-columns: 1fr; }
    .signup-foot { flex-direction: column-reverse; align-items: stretch; text-align: center; padding-inline: 1.25rem; }
    .signup-alert { padding-inline: 1.25rem; }
}

@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
}